What's a Pakistani shirt worth?

If I can buy an Australian One Day shirt for 40 pounds (or AU$100) and I can buy a Pakistani shirt for 20 pounds (or AU$35.99) does that mean I can buy 2 Pakistani shirts for AU$71.98 (or 40 pounds) and trade them for one Australian shirt which i can then sell for AU$100.

If I can buy an Australian One Day shirt for 40 pounds (or AU$100) and I can buy a Pakistani shirt for 20 pounds (or AU$35.99) does that mean I can buy 2 Pakistani shirts for AU$71.98 (or 40 pounds) and trade them for one Australian shirt which i can then sell for AU$100.